CN108531949A - A kind of chrome-plating method of automotive plastic accessory - Google Patents
A kind of chrome-plating method of automotive plastic accessory Download PDFInfo
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- CN108531949A CN108531949A CN201810462574.9A CN201810462574A CN108531949A CN 108531949 A CN108531949 A CN 108531949A CN 201810462574 A CN201810462574 A CN 201810462574A CN 108531949 A CN108531949 A CN 108531949A
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- nickel
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/54—Electroplating of non-metallic surfaces
- C25D5/56—Electroplating of non-metallic surfaces of plastics
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/22—Roughening, e.g. by etching
- C23C18/24—Roughening, e.g. by etching using acid aqueous solutions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/285—Sensitising or activating with tin based compound or composition
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/20—Pretreatment of the material to be coated of organic surfaces, e.g. resins
- C23C18/28—Sensitising or activating
- C23C18/30—Activating or accelerating or sensitising with palladium or other noble metal
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
- C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/08—Deposition of black chromium, e.g. hexavalent chromium, CrVI
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/38—Electroplating: Baths therefor from solutions of copper
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
- C25D5/14—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium two or more layers being of nickel or chromium, e.g. duplex or triplex layers
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Electroplating Methods And Accessories (AREA)
- Chemically Coating (AREA)
Abstract
The invention discloses a kind of chrome-plating methods of automotive plastic accessory, this method mainly comprises the following steps oil removing, roughening, neutralization, preimpregnation, palladium activation, dispergation, chemical nickel plating, copper pre-plating, acid coppering, plating semi-gloss nickel, bright nickel plating, nickel envelope, chromium plating, modified surface activator has wherein been used in pretreatment process, to be modified to Automobile Plastic Parts, improve its hydrophilicity and the binding force to coating, it has many advantages, such as that stability is strong, it is strong to inhale plating ability, makes that final plating finished product stability is good, validity period limit for length.
Description
Technical field
The present invention relates to automobile technical field more particularly to a kind of chrome-plating methods of automotive plastic accessory.
Background technology
In recent years, with manufacturing continuous development, plastic surface galvanizing alloying technology also continues to develop.In automobile making
In industry, not only metal surface will pass through electroplating processes, and various electroplating processes are also done as Automobile Plastic Parts.After electroplated
Plastic products, integrate the characteristic of plastics, metal, not only appearance is able to beautiful decoration, and the physics of product, mechanicalness
Can all have significant improvement, and assign the new features such as conduction, magnetic conduction, welding.
Traditional plastic part electroplating technology mainly include oil removing, roughening, neutralization, preimpregnation, palladium activation, dispergation, chemical nickel plating,
Copper pre-plating, acid coppering, plating semi-gloss nickel, bright nickel plating, nickel envelope, chromium plating these steps, the main purpose of wherein coarsening process is to carry
High piece surface hydrophily and formation roughness appropriate, to ensure that coating has good combination power, it is to determine binding force of cladding material
Critical process.And in real work, it is different since the plastic fittings of automobile is not of uniform size, and most plastics are matched
There are many part corner, or even there is also the holes of many interior concavitys, this causes the quality of its plated item quality to have greatly not
Stability, therefore ensure that the good combination power of Automobile Plastic Parts coating inhales plating ability as the technology that must be solved to improve it
Problem.
Invention content
The present invention is in view of the deficienciess of the prior art, provide a kind of chrome-plating method of automotive plastic accessory, specifically
Technical solution is as follows：
A kind of chrome-plating method of automotive plastic accessory, includes the following steps：
（1）Automobile Plastic Parts are fixed with fixing tool and are sent to degreasing tank to carrying out roughing in surface to it again after its surface degreasing
Processing, has sent after roughening treatment to neutralization chamber neutralisation treatment；
（2）Dispergation is carried out after above-mentioned Automobile Plastic Parts are activated with palladium activator, dissolving is adsorbed in palladium glue core outer layer
Component；
（3）Above-mentioned Automobile Plastic Parts are subjected to chemical nickel plating, it is made to have electric conductivity；
（4）Above-mentioned Automobile Plastic Parts are subjected to the preliminary substrate of copper pre-plating, then carry out acid coppering operation；
（5）Above-mentioned Automobile Plastic Parts are carried out to plating semi-gloss nickel, bright nickel plating and nickel envelope operation successively；
（6）Above-mentioned Automobile Plastic Parts are transferred in chrome-plating bath and complete chromium plating.
Further, the step（1）Middle removal operation the specific steps are be immersed in 50 ~ 60 by Automobile Plastic Parts
DEG C degreasing tank in, the supersound process 10min for being 15KHz-25KHz with frequency contains the change of 45 ~ 60g/L in the degreasing tank
Learn the modified surface activator of degreasing powder and 3 ~ 5mL/L.
Further, the step（1）Middle roughening operation the specific steps are by the Automobile Plastic Parts after oil removing with super
Sound cleans 5min, and 20 ~ 30min is then impregnated in the modified surface activator of 5 ~ 10mL/L, with ultrasonic cleaning after immersion
Then Automobile Plastic Parts are immersed in 60 ~ 70 DEG C of roughening slot by 5min, contain 400~450g/L's in the roughening slot
Chromic anhydride, the sulfuric acid of 350~400g/L.
Further, the preparation method of the modified surface activator is, at normal temperatures by nitric acid, postassium hypochlorite and over cure
Sour sodium is soluble in water successively and is stirred continuously, and after the completion of stirring, above-mentioned solution is placed in 40 ~ 60 DEG C of constant water bath box and is stirred
It mixes, and polyglycereol, silane coupling agent and ester based quaternary ammonium salt is added simultaneously, with frequency be the super of 15KHz-25KHz while stirring
Sonication 10min, you can obtain modified surface activator.
Further, the ratio of each component is in the modified surface activator 8 ~ 12 parts of postassium hypochlorite, 5 ~ 10 parts of nitric acid,
3 ~ 8 parts of sodium peroxydisulfate, 8 ~ 12 parts of polyglycereol, 7 ~ 12 parts of silane coupling agent, 6 ~ 11 parts of ester based quaternary ammonium salt, 30 ~ 50 parts of water.
Beneficial effects of the present invention：Modified surface activator has been used in the pretreatment process of Automobile Plastic Parts, from
And Automobile Plastic Parts are modified, its hydrophilicity and the binding force to coating are improved, suction plating strong with stability
The advantages that ability is strong, makes that final plating finished product stability is good, validity period limit for length.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
It stocks up by each component mass ratio：8 parts of postassium hypochlorite, 5 parts of nitric acid, 3 parts of sodium peroxydisulfate, 8 parts of polyglycereol, silane coupling agent 7
Part, 6 parts of ester based quaternary ammonium salt, 30 parts of water.It is at normal temperatures that nitric acid, postassium hypochlorite and sodium peroxydisulfate is soluble in water successively and constantly stir
It mixes, after the completion of stirring, above-mentioned solution is placed in 40 ~ 60 DEG C of constant water bath box and is stirred, and it is even that polyglycereol, silane are added simultaneously
Join agent and ester based quaternary ammonium salt, the supersound process 10min that stirring while is 15KHz-25KHz with frequency, you can modified surface
Activator.
Automobile Plastic Parts are immersed in 50 ~ 60 DEG C of degreasing tank, the supersound process for being 15KHz-25KHz with frequency
10min, the modified surface activator of electrochemical deoiling powder and 3mL/L containing 45g/L in the degreasing tank, by the automobile after oil removing
Then plastic fittings is impregnated 20 ~ 30min in the modified surface activator of 5mL/L, is used after immersion with 5min is cleaned by ultrasonic
It is cleaned by ultrasonic 5min, then Automobile Plastic Parts is immersed in 60 ~ 70 DEG C of roughening slot, contain 400g/L in the roughening slot
Chromic anhydride, the sulfuric acid of 350g/L, will complete roughening Automobile Plastic Parts 5ml/L hydrazine hydrates and 60ml/L hydrochloric acid neutralize, so
Palladium activation is carried out to it with 300mL/L concentrated hydrochloric acids, 25ppm palladiums activator and 8g/L stannous chlorides at 26 DEG C afterwards, then uses 80g/L
Sulfuric acid dispergation is adsorbed in palladium glue core outer layer component to dissolve, then in NH4Cl, 30g/L of NiCl, 240g/L containing 220g/L
Nickel plating in the nickel bath that sodium hypophosphite, 10g/L sodium citrates and 14ml/L ammonium hydroxide pH are 8.0, maintains the temperature at 30 DEG C, nickel plating knot
Automobile Plastic Parts are transferred to preplating in the solution of 60g/L cupric pyrophosphates, 330g/L potassium pyrophosphates, 22g/L ammonium citrates after beam
And then copper carries out acid coppering with the CP hydrochloric acid of the copper sulphate of 200g/L, the CP sulfuric acid of 60g/L, 70g/L, then carries out successively
Semi-gloss nickel, bright nickel plating and nickel envelope operation are plated, wherein the reagent set of plating semi-gloss nickel becomes the NiSO4 of 250g/L, 240g/L's
The phosphoric acid of NiCl, 40g/L and the not sulfur-containing additive of 8mL/L, the reagent set of bright nickel plating become the NiSO4,240g/ of 250g/L
The reagent set of the phosphoric acid of the NiCl of L, 40g/L and the sulfur-containing additive of 8mL/L, nickel envelope aoxidizes as the porous nano of 0.5mg/L
Aluminium finally completes chromium plating in the CrO3 containing 280g/L, the solution of the softening agent of the H2SO4 of 200g/L, 5mL/L.
In the present embodiment, the adhesive force of Automobile Plastic Parts surface matrix and coating is high, and permeation layer thickness is reachable
0.004mm, plastic surface layer are embedded in the deeper metal layers of 0.004mm so that metal layer is tightly adhered to one with plastic-substrates
It rises, the surface durability of product is enable to extend.
Embodiment 2
It stocks up by each component mass ratio：10 parts of postassium hypochlorite, 8 parts of nitric acid, 5 parts of sodium peroxydisulfate, 10 parts of polyglycereol, silane coupling agent
10 parts, 8 parts of ester based quaternary ammonium salt, 40 parts of water.It is at normal temperatures that nitric acid, postassium hypochlorite and sodium peroxydisulfate is soluble in water and continuous successively
Stirring, after the completion of stirring, above-mentioned solution is placed in 40 ~ 60 DEG C of constant water bath box and is stirred, and polyglycereol, silane are added simultaneously
Coupling agent and ester based quaternary ammonium salt, the supersound process 10min that stirring while is 15KHz-25KHz with frequency, you can table must be modified
Face activator.
Automobile Plastic Parts are immersed in 50 ~ 60 DEG C of degreasing tank, the supersound process for being 15KHz-25KHz with frequency
10min, the modified surface activator of electrochemical deoiling powder and 4mL/L containing 50g/L in the degreasing tank, by the automobile after oil removing
Then plastic fittings is impregnated 20 ~ 30min in the modified surface activator of 8mL/L, is used after immersion with 5min is cleaned by ultrasonic
It is cleaned by ultrasonic 5min, then Automobile Plastic Parts is immersed in 60 ~ 70 DEG C of roughening slot, contain 425g/L in the roughening slot
Chromic anhydride, the sulfuric acid of 380g/L, will complete roughening Automobile Plastic Parts 8ml/L hydrazine hydrates and 65ml/L hydrochloric acid neutralize, so
Palladium activation is carried out to it with 320mL/L concentrated hydrochloric acids, 30ppm palladiums activator and 10g/L stannous chlorides at 26 DEG C afterwards, then uses 85g/
L sulfuric acid dispergation is adsorbed in palladium glue core outer layer component to dissolve, then in NH4Cl, 40g/ of NiCl, 250g/L containing 230g/L
Nickel plating in the nickel bath that L sodium hypophosphites, 12g/L sodium citrates and 18ml/L ammonium hydroxide pH are 8.0, maintains the temperature at 30 DEG C, nickel plating
After Automobile Plastic Parts are transferred in the solution of 65g/L cupric pyrophosphates, 350g/L potassium pyrophosphates, 25g/L ammonium citrates in advance
And then copper facing carries out acid coppering with the CP hydrochloric acid of the copper sulphate of 230g/L, the CP sulfuric acid of 65g/L, 80g/L, then successively into
Row plating semi-gloss nickel, bright nickel plating and nickel envelope operation, wherein the reagent set of plating semi-gloss nickel becomes the NiSO4 of 275g/L, 250g/L's
The phosphoric acid of NiCl, 55g/L and the not sulfur-containing additive of 10mL/L, the reagent set of bright nickel plating become the NiSO4 of 265g/L,
The reagent set of the phosphoric acid of the NiCl of 250g/L, 50g/L and the sulfur-containing additive of 10mL/L, nickel envelope is received as the micropore of 0.8mg/L
Rice aluminium oxide, finally completes chromium plating in the CrO3 containing 290g/L, the solution of the softening agent of the H2SO4 of 230g/L, 8mL/L.
In the present embodiment, the adhesive force of Automobile Plastic Parts surface matrix and coating is high, and permeation layer thickness is reachable
0.003mm, plastic surface layer are embedded in the deeper metal layers of 0.004mm so that metal layer is tightly adhered to one with plastic-substrates
It rises, the surface durability of product is enable to extend.
Embodiment 3
It stocks up by each component mass ratio：It is 12 parts of postassium hypochlorite, 10 parts of nitric acid, 8 parts of sodium peroxydisulfate, 12 parts of polyglycereol, silane coupled
12 parts of agent, 11 parts of ester based quaternary ammonium salt, 50 parts of water.At normal temperatures by nitric acid, postassium hypochlorite and sodium peroxydisulfate successively it is soluble in water simultaneously
Be stirred continuously, after the completion of stirring, above-mentioned solution be placed in 40 ~ 60 DEG C of constant water bath box and is stirred, and be added simultaneously polyglycereol,
Silane coupling agent and ester based quaternary ammonium salt, the supersound process 10min that stirring while is 15KHz-25KHz with frequency, you can must change
Property surfactant.
Automobile Plastic Parts are immersed in 50 ~ 60 DEG C of degreasing tank, the supersound process for being 15KHz-25KHz with frequency
10min, the modified surface activator of electrochemical deoiling powder and 5mL/L containing 60g/L in the degreasing tank, by the automobile after oil removing
Then plastic fittings impregnates 20 ~ 30min, after immersion with 5min is cleaned by ultrasonic in the modified surface activator of 10mL/L
With 5min is cleaned by ultrasonic, then Automobile Plastic Parts are immersed in 60 ~ 70 DEG C of roughening slot, are contained in the roughening slot
The chromic anhydride of 450g/L, the sulfuric acid of 400g/L will complete Automobile Plastic Parts the 10ml/L hydrazine hydrates and 85ml/L hydrochloric acid of roughening
It neutralizes, palladium activation then is carried out to it with 350mL/L concentrated hydrochloric acids, 35ppm palladiums activator and 15g/L stannous chlorides at 26 DEG C,
It is adsorbed in palladium glue core outer layer component to dissolve with 100g/L sulfuric acid dispergation again, then in NiCl, 280g/L containing 250g/L
Nickel plating in the nickel bath that NH4Cl, 50g/L sodium hypophosphite, 15g/L sodium citrates and 18ml/L ammonium hydroxide pH are 8.0, maintains the temperature at
30 DEG C, Automobile Plastic Parts are transferred to 80g/L cupric pyrophosphates, 350g/L potassium pyrophosphates, 28g/L ammonium citrates after nickel plating
And then copper pre-plating in solution carries out acid coppering, so with the CP hydrochloric acid of the copper sulphate of 250g/L, the CP sulfuric acid of 80g/L, 80g/L
Carry out plating semi-gloss nickel, bright nickel plating and nickel envelope operation successively afterwards, wherein the reagent set of plating semi-gloss nickel becomes the NiSO4 of 280g/L,
The phosphoric acid of the NiCl of 265g/L, 60g/L and the not sulfur-containing additive of 15mL/L, the reagent set of bright nickel plating is as 280g/L's
The phosphoric acid of the NiCl of NiSO4,270g/L, 60g/L and the sulfur-containing additive of 15mL/L, the reagent set of nickel envelope is as the micro- of 1mg/L
Hole nano aluminium oxide is finally completed in the CrO3 containing 300g/L, the solution of the softening agent of the H2SO4 of 250g/L, 10mL/L
Chromium plating.
In the present embodiment, the adhesive force of Automobile Plastic Parts surface matrix and coating is high, and permeation layer thickness is reachable
0.004mm, plastic surface layer are embedded in the deeper metal layers of 0.005mm so that metal layer is tightly adhered to one with plastic-substrates
It rises, the surface durability of product is enable to extend.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (5)
1. a kind of chrome-plating method of automotive plastic accessory, includes the following steps：
（1）Automobile Plastic Parts are fixed with fixing tool and are sent to degreasing tank to carrying out roughing in surface to it again after its surface degreasing
Processing, has sent after roughening treatment to neutralization chamber neutralisation treatment；
（2）Dispergation is carried out after above-mentioned Automobile Plastic Parts are activated with palladium activator, dissolving is adsorbed in palladium glue core outer layer
Component；
（3）Above-mentioned Automobile Plastic Parts are subjected to chemical nickel plating, it is made to have electric conductivity；
（4）Above-mentioned Automobile Plastic Parts are subjected to the preliminary substrate of copper pre-plating, then carry out acid coppering operation；
（5）Above-mentioned Automobile Plastic Parts are carried out to plating semi-gloss nickel, bright nickel plating and nickel envelope operation successively；
（6）Above-mentioned Automobile Plastic Parts are transferred in chrome-plating bath and complete chromium plating.
2. a kind of chrome-plating method of automotive plastic accessory as described in claim 1, which is characterized in that the step（1）In
Removal operation the specific steps are be immersed in 50 ~ 60 DEG C of degreasing tank by Automobile Plastic Parts, be 15KHz- with frequency
The supersound process 10min of 25KHz, the modified surface of electrochemical deoiling powder and 3 ~ 5mL/L containing 45 ~ 60g/L in the degreasing tank
Activator.
3. a kind of chrome-plating method of automotive plastic accessory as described in claim 1, which is characterized in that the step（1）In
Roughening operation the specific steps are by the Automobile Plastic Parts after oil removing with being cleaned by ultrasonic 5min, then changing in 5 ~ 10mL/L
Property surfactant in impregnate 20 ~ 30min, after immersion be cleaned by ultrasonic 5min, then Automobile Plastic Parts are immersed in
In 60 ~ 70 DEG C of roughening slot, the chromic anhydride containing 400~450g/L in the roughening slot, the sulfuric acid of 350~400g/L.
4. the chrome-plating method of any automotive plastic accessory as described in claim 2 and 3, which is characterized in that the modification
The preparation method of surfactant is, at normal temperatures that nitric acid, postassium hypochlorite and sodium peroxydisulfate is soluble in water successively and constantly stir
It mixes, after the completion of stirring, above-mentioned solution is placed in 40 ~ 60 DEG C of constant water bath box and is stirred, and it is even that polyglycereol, silane are added simultaneously
Join agent and ester based quaternary ammonium salt, the supersound process 10min that stirring while is 15KHz-25KHz with frequency, you can modified surface
Activator.
5. a kind of chrome-plating method of automotive plastic accessory as claimed in claim 4, which is characterized in that the modified surface is lived
It the ratio of each component is 8 ~ 12 parts of postassium hypochlorite, 5 ~ 10 parts of nitric acid, 3 ~ 8 parts of sodium peroxydisulfate, 8 ~ 12 parts of polyglycereol, silane in agent
7 ~ 12 parts of coupling agent, 6 ~ 11 parts of ester based quaternary ammonium salt, 30 ~ 50 parts of water.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109946169A (en) * | 2019-04-10 | 2019-06-28 | 珠海市永刚塑料制品有限公司 | A kind of tensile test technique of automobile decoration piece product |
| CN110106539A (en) * | 2019-04-26 | 2019-08-09 | 湖北三赢兴智能光电科技有限公司 | A kind of electroforming technique of plastics |
| CN110129846A (en) * | 2019-04-17 | 2019-08-16 | 闽西职业技术学院 | A kind of bathroom and automobile plastic cement plated item mould inhibitor |
| CN111893463A (en) * | 2020-08-03 | 2020-11-06 | 沈阳道达汽车饰件有限公司 | Surface adjustment process for improving palladium adsorption performance of surface of electroplating-grade plastic part |
| CN114107985A (en) * | 2021-11-12 | 2022-03-01 | 中航光电科技股份有限公司 | Plating process of marine environment resistant composite material plating layer |
| CN114703522A (en) * | 2022-04-26 | 2022-07-05 | 上海瑞尔实业有限公司 | Chromium plating process for air inlet grille |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109946169A (en) * | 2019-04-10 | 2019-06-28 | 珠海市永刚塑料制品有限公司 | A kind of tensile test technique of automobile decoration piece product |
| CN110129846A (en) * | 2019-04-17 | 2019-08-16 | 闽西职业技术学院 | A kind of bathroom and automobile plastic cement plated item mould inhibitor |
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| CN111893463A (en) * | 2020-08-03 | 2020-11-06 | 沈阳道达汽车饰件有限公司 | Surface adjustment process for improving palladium adsorption performance of surface of electroplating-grade plastic part |
| CN114107985A (en) * | 2021-11-12 | 2022-03-01 | 中航光电科技股份有限公司 | Plating process of marine environment resistant composite material plating layer |
| CN114703522A (en) * | 2022-04-26 | 2022-07-05 | 上海瑞尔实业有限公司 | Chromium plating process for air inlet grille |
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